4.2 Upgrade> can't turn on bluetooth.

Re: 4.2 Upgrade> can't turn on bluetooth.

I had this problem once prior to 4.2. No matter what I did, I couldn't turn bluetooth on. After I powered off the phone and turned it back on. Then I could turn bluetooth off and on with no problem. Hasn't happened since. So you may try powering off the phone and/or pulling the battery and see if that fixes it.

Re: 4.2 Upgrade> can't turn on bluetooth.

also, try location services under GPS settings, turn it off and then back on (the one asking you about using wifi to localize you faster) the bluetooth and wifi are both 802.11 standards, therefore they are controlled by the same chip (this has worked for me 2x now)

Re: 4.2 Upgrade> can't turn on bluetooth.

Anyone else having this issue?
Since I upgraded to 4.2, both of my Galaxy Nexus phones can't turn bluetooth on.

I was having this issue, as were a few users on xda. There is one confirmed solution, and one that may work (only one person has had luck with it in the forums). I used the first solution.

The first solution has you using fastboot, so your bootloader would need to be unlocked. Essentially you flash a new radio, bootloader, image .. basically everything except "userdata.img" so that you can keep all your apps/settings/personalizations. And it worked for me. --- I was rooted (but with stock recovery), and I lost root. You do NOT need root to use this solution, I simply want to highlight that you would lose root if you did have it. What you do need is an unlocked bootloader, and if your bootloader is locked currently, then unlocking will cause the phone to lose all data (thus backup!, actually backup regardless!).

The second solution is if you're running CWM in recovery, you use the CWM-based update, and just reflash it (only one person in the forum tried this and it worked for him).

Re: 4.2 Upgrade> can't turn on bluetooth.

Thanks for all the replies. I had actually tried rebooting and pulling the battery and airplane mode. I also did a factory reset.
I tried flashing the radio but I hadn't tried the other solutions yet.
I actually have two phones, it happened on both. I just completely reflashed my phone with the nexus toolkit and the image from google which fixed it.
My wife likely wouldn't take kindly to losing all her stuff so I'm trying to find a less invasive solution.

Re: 4.2 Upgrade> can't turn on bluetooth.

Re: 4.2 Upgrade> can't turn on bluetooth.

after "updating" to 4.2.1 bt acting strangely. it works sometimes, but today refuse to even turn on! nothing helps, it wont turn on no matter what. is it so hard for company like google to provide at least working bluetooth on its phones? this one is major pain, but bt wasnt working properly since i have the phone...i dont want to turn myself into anonymous hacker in order to have working such trivial thing like bt on my phone...i'm more and more into thinking how android is really god forbiden operating system...